Cas it's exactly as you say. Once you have the M21 flywheels, you use the M20/21 conrod and the M21 piston. And if you still had the B33 piston that you sent me....you could have 635cc.:yum:
If you're viewing stuff on ebay, it would be better to message the seller for the measurement. Even just from the top of the mainshaft to the center of the big end, to make it easier for them, would confirm it. Ron
You'll need an unlinered barrel (if you don't have one) or will have to fit an oversize liner to your linered barrel if you want to use a B33 piston....Ian
You'll need an unlinered barrel (if you don't have one) or will have to fit an oversize liner to your linered barrel if you want to use a B33 piston....Ian
We had this discussion some time ago Ian. As I was unsure whether my barrel has a liner or not! But as I have a NOS liner in stock to measure and calculated that there would be 2mm of wall thickness after boring for the 85mm piston.....You said it would be OK as you've seen Goldies with thinner liners. Ron
Thanks for correcting that Ron...I didn't recall the previous discussion and I really don't like misinforming people....I've previously used liners with a 1.5mm wall thickness myself so I know 2mm is OK...
For anyone who may be contemplating an even bigger engine I recently fitted an oversize liner to a linered barrel big enough to fit a 90mm piston, so it is possible (just)......Ian
thank you all, especially Michiel for confirming. I now know what to look for.
The stock piston should be enough. I had an M21 previously and the extra 2 horses was enough to be able to cruise at 60mph which is ample around here. Not planning on racing. Trevor might have some advice on carbs...
The five-oh island would be Oahu which is where the tourists go to see the grass huts we all live in and the telephone the professor made with 2 coconuts and a vine. I live on Hawaii Island which is a couple hundred miles to the east; more agricultural, less touristy. It is about 60 miles across and 14,000 ft high, and in true American style, you can drive to the summit. Basically it's a 60 mile wide volcano (still active).
Only about 150,000 people here and one BSA sidevalve rider. You're all welcome to come visit and I'm sure I can find you something to ride. A bit different from where I was born which is just a few miles from Bastiaan.
If I need parts I can order them online on Ebay or from some of the excellent British parts stores, but with used parts, I need to know what to look for before buying. Sometimes I get it wrong and that is the price I willingly pay to live in paradise.
Recently I refurbished an M21 which originally came from Adelaide (God knows how) and sold it to someone on Maui. Riding that, I was surprised at how more "eager" it seemed and definitely happier at 55-65 MPH. Figured my next one would have to be with an M21 crank. Its amazing how many old Brit bikes there are rotting away in people's barns, and they somehow seem to find their way into my stash of project bikes.
Cas please continue with the geography lesson. Hawaii became the (last) 50th state of America in 1959. Therefore does that mean the whole island group? Is the TV show Hawaii Five Oh based on the island Oahu? I've seen snippets of the show but never really watched it. Of course Pearl Harbour was also at Oahu, but again always referred to as Hawaii. :thinking_face: Ron
Cas
Thanks for the update.
Living outside Adelaide, I'm an ex neighbour of the M21 you did up. I still call my bike an M20 (1941) but it's now 600 & I agree that for road riding nowadays these are a better bet.
Thanks for the invitation to visit. If I ever come I'll bring you a kangaroo. They can be kept quite easily in grass huts.
hi Ron,
I never thought I'd be giving a geography lesson on a motorcycle forum....
The group of 8 islands is the state of Hawaii, but the main island is Oahu where the capitol Honolulu is situated. Both the old and new versions of Hawaii five oh were recorded there as was Jurasic Park and Gilligan's island (for those of us old enough to remember). Hawaii island is normally called the Big Island which helps to help reduce confusion. I came here about 12 years ago for a short contract job and saw absolutely no reason to leave.
There are a handful of old brit bike geezers scattered throughout the state but very few on the Big Island, and even fewer Beeza riders.
Thanks Cas, I'm fully enlightened now. They had to rearrange the "Star Spangled Banner" because of the extra two post war states:- Hawaii and Alaska :relaxed: Ron